There is a membership to Amazing Embroidery Designs, but not for the other sister sites, Adorable Applique and CuteAlphabets.
You can always ask your questions here as Cuties are very helpful.
Amazing Embroidery Designs has a paid membership available. There is a link to it on the front page of that site. Adorable Applique does not. It has regular sales on some designs -- but all are for individual purchase.
You can contact Cute Moderators via PM as well.
Please read through the posts in the Q&A section of this site for more information.